Fertilization of Natural Lakes in Michigan
作者： Robert C. Ball
DOI: 10.1577/1548-8659(1948)78[145:FONLIM]2.0.CO;2
关键词: Algae 、 Heavy growth 、 Trout 、 Ecology 、 Human fertilization 、 Environmental science 、 Fertilizer 、 Agronomy 、 Secchi disk 、 Bloom 、 Nutrient
摘要: Abstract Inorganic fertilizer was applied to two state-owned lakes in northern Michigan, one a 4.3-acre trout lake and the other 27.5-acre warm-water lake. Two nearby were kept under observation as controls. Fertilizer brought about plankton-algae bloom first summer produced very heavy growth of filamentous algae second summer. The responded much less added nutrients; reading Secchi disk at no time than 8.2 feet. No appreciable oxygen depletion occurred during winter following season fertilization. Chemical analysis February showed severe depletion, with levels 1 p.p.m. all depths. An almost complete winterkill both fertilized lakes. control
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